After "The Poseidon Adventure" (1972), in which the ship got flipped over by a tidal wave, the ship drifts bottom-up in the sea. While there are passengers still on-board waiting to be rescued, two rivaling salvage parties enter the ship in search of money, gold, and a small amount of plutonium.
Beyond the Poseidon Adventure
An extension of the previous film, wherein a group of adventurers return to the overturned ship to seek several fortunes.
